Page 1 of 53
EXAM 3: BIOS251 / BIOS 251 ANATOMY &
PHYSIOLOGY I WITH LAB (LATEST 2025 UPDATES
STUDY BUNDLE WITH COMPLETE SOLUTIONS) | 100%
CORRECT | GRADE A - CHAMBERLAIN
What is the structure of the skin? .....ANSWER.....epidermis,
dermis, hypodermis
What is accessory structures for the skin? .....ANSWER.....Hair,
nails, oil glands and sweat glands
Whats the skin functions? .....ANSWER.....protection, sensations,
synthesis vitamin D, not taking in or out water, thermoregulation
and non verbal communication
What cells is the epidermis comprised of?
.....ANSWER.....Stratified squamous epithelium, keratinocytes,
melanocytes, langerhan cells, and merkel cells.
,Page 2 of 53
What is the dermis composed of? .....ANSWER.....collagen, elastic
and reticular fibers
What is the cutaneous membrane? .....ANSWER.....dermis +
epidermis
The dermis has what two layers? .....ANSWER.....papillary and
reticular
The dermis has what within the layer? .....ANSWER.....blood
vessels, nerve endings, cutaneous glands, hair follicle, and hair
roots.
What is the dermal papillae? .....ANSWER.....projections from the
dermis
What is the epidermal ridges? .....ANSWER.....The grooves that
form fingerprints
What is the papillary layer? .....ANSWER.....Thin first layer, made
of areolar tissue and rich in blood.
,Page 3 of 53
What is the reticular layer? .....ANSWER.....Thick layer, irregular
dense tissue, collagen-elastic fibers, hair follicles, hair roots,
nerve endings, cutaneous glands, AND STRETCH MARKS
What is the hypodermics composed of? .....ANSWER.....loose
dense tissue of adipose-areolar, vascularized, connects skin to
fascia, and holds fat.
What is keratinocytes? .....ANSWER.....produces keratin to
toughen up the skin and retains water.
What is melanocytes? .....ANSWER.....produce the pigment
melanin and protects from UV
What is a Langerhans cell? .....ANSWER.....immune response to
microbes and easily damaged by UV light.
Where is langerhans cell found? .....ANSWER.....Between stratum
spinosum and granslum
What is merkel cells? .....ANSWER.....receptors for touch
, Page 4 of 53
Whats in the stratum basale? .....ANSWER.....merkel cells and
melanocytes
What is the function for papillary layer? .....ANSWER.....supplies
nutrients to the epidermis and regulates temperature
What is the function for reticular layer? .....ANSWER.....full of
fibers for strength by elastic fibers and has hair follicles.
What doe collagen and elastic fibers do? .....ANSWER.....tensile
strength, resist pulling and stretching
What is fibers produced by? .....ANSWER.....fibroblast cells, and
form matrix of dermis
What is adipocytes? .....ANSWER.....produce fat, connects with
hypodermis
Whats is the function of hypodermis? .....ANSWER.....Protects and
pads underlying tissue, stores energy, provides insulation
Where is the Hair shaft .....ANSWER.....part of hair above skin
EXAM 3: BIOS251 / BIOS 251 ANATOMY &
PHYSIOLOGY I WITH LAB (LATEST 2025 UPDATES
STUDY BUNDLE WITH COMPLETE SOLUTIONS) | 100%
CORRECT | GRADE A - CHAMBERLAIN
What is the structure of the skin? .....ANSWER.....epidermis,
dermis, hypodermis
What is accessory structures for the skin? .....ANSWER.....Hair,
nails, oil glands and sweat glands
Whats the skin functions? .....ANSWER.....protection, sensations,
synthesis vitamin D, not taking in or out water, thermoregulation
and non verbal communication
What cells is the epidermis comprised of?
.....ANSWER.....Stratified squamous epithelium, keratinocytes,
melanocytes, langerhan cells, and merkel cells.
,Page 2 of 53
What is the dermis composed of? .....ANSWER.....collagen, elastic
and reticular fibers
What is the cutaneous membrane? .....ANSWER.....dermis +
epidermis
The dermis has what two layers? .....ANSWER.....papillary and
reticular
The dermis has what within the layer? .....ANSWER.....blood
vessels, nerve endings, cutaneous glands, hair follicle, and hair
roots.
What is the dermal papillae? .....ANSWER.....projections from the
dermis
What is the epidermal ridges? .....ANSWER.....The grooves that
form fingerprints
What is the papillary layer? .....ANSWER.....Thin first layer, made
of areolar tissue and rich in blood.
,Page 3 of 53
What is the reticular layer? .....ANSWER.....Thick layer, irregular
dense tissue, collagen-elastic fibers, hair follicles, hair roots,
nerve endings, cutaneous glands, AND STRETCH MARKS
What is the hypodermics composed of? .....ANSWER.....loose
dense tissue of adipose-areolar, vascularized, connects skin to
fascia, and holds fat.
What is keratinocytes? .....ANSWER.....produces keratin to
toughen up the skin and retains water.
What is melanocytes? .....ANSWER.....produce the pigment
melanin and protects from UV
What is a Langerhans cell? .....ANSWER.....immune response to
microbes and easily damaged by UV light.
Where is langerhans cell found? .....ANSWER.....Between stratum
spinosum and granslum
What is merkel cells? .....ANSWER.....receptors for touch
, Page 4 of 53
Whats in the stratum basale? .....ANSWER.....merkel cells and
melanocytes
What is the function for papillary layer? .....ANSWER.....supplies
nutrients to the epidermis and regulates temperature
What is the function for reticular layer? .....ANSWER.....full of
fibers for strength by elastic fibers and has hair follicles.
What doe collagen and elastic fibers do? .....ANSWER.....tensile
strength, resist pulling and stretching
What is fibers produced by? .....ANSWER.....fibroblast cells, and
form matrix of dermis
What is adipocytes? .....ANSWER.....produce fat, connects with
hypodermis
Whats is the function of hypodermis? .....ANSWER.....Protects and
pads underlying tissue, stores energy, provides insulation
Where is the Hair shaft .....ANSWER.....part of hair above skin
